Major in the British Army, amateur
entomologist-ornithologist-mammologist; Curator of the Sarawak Museum,
1905-15, and founder of the Sarawak Museum Journal in 1911; joining his
regiment from 1915-16 serving in India, coming to Singapore serving as staff
officer until 1919. In July 1919 he was appointed Director of the Raffles
Museum and Library, Singapore, resigning in 1923, to return to Sarawak as
Chief Secretary of the Government, etc. He took his D.Sc. (Oxon.) in
1924. According to the obituary, he visited Borneo twice while in charge of
the Raffles Museum.

Besides the below-mentioned papers, he published on Borneo birds in the
Sarawak Gazette, 1913-14.

The genus Moultonianthus Merr.
and many species of plants were named after him.

NW. Borneo, Sarawak. 1909. Banting and Simanggang
Distr. (May); Lawas Distr. (Aug.-Sept.); Mt Penrissen (end of Nov.).1-1910.
Up the Limbang River, in an endeavour to reach Mt Batu Lawi (March-Apr.);
short excursions to Bintulu and the Samarahan Distr. (10 days each); Mt
Matang, Santubong and Upper Sarawak (day or 2 each).-1911. ExpeditiontoMtBatuLawi on the headwaters of the
Limbang River:2 leaving Kuching (May 2),
Limbang (5), up-river journey from Bidang (7-16), reaching upper waters of
the Madihit (l7), overland journey, climbing Mt Turan, Mt Derian, Mt ?
Selinguid; Batu Lawi (29-30), reaching 600 ft below the summit; Kalabit
(June 3); the Dayak collectors returning down the Mahidit and Limbang
River; Moulton to the Seridan
River behind the Molu Range, down the Mago River, across country to a
tributary of the Apoh and down into the main Baram River (15), spending a
month at Claudetown; Kuching (July 17). Mt Klingkang at the head of the
Simunjan River (Oct.); Mt Matang, Santubong and Satang-1912.
Fortnight on Mt Serambu (Jan.).-1913. Mt Poi (Apr. 15-20; also on
the summit, G. Rumput);3ExpeditiontoMtKinabalu (Br. N. Borneo) via
Tampassuk Road, Kiau (Aug. 8-Oct. 16),4
reaching the summit Aug. 25, staying 6 weeks on the mountain at different
altitudes, making camp near the summit (Pakka camp) (5 days), at
Kamborangah (5 days), Lobong (Sept. 3, staying a week), at the entrance of
the Minitindok Gorge, exploring the NW. spur (Marei Parii), and returning
to Kiau, etc.-1914. Headwaters of the Sadong River and Mt
Merinjak, return journey across the foot of Nit Penrissen and down the
Sarawak River.5 Upper Baram River, reaching
the first Kalabit village at the head of the Akar River, but having to
return on Nov. 19; staying 11 days on Nit Merinjak on the Dutch border.-1920.
2nd Attempt to reach the Kalabit Country (Oct.), which neither met with
success, and the expedition soon returned;6
according to Mjöberg
he was about Liomatu and on the mountains to the north of it.

On G. Lingga, situated 4 miles from the sea and 100 from Kuching, he had
collecting done at 2-3000 ft by 2 Dyak collectors.